Thread traverse drum, particularly for winding machines



March 6, 1945. w" SIEGENTHALER 2,370,923

THREAD TRAVERSE DRUM, PARTICULARLY FOR WINDING MACHINES Filed May 28;1943 3 .5 a .5 6 MW my [72 van Patented Mar. 6. 1945 UNlTED STATE FORWINDING MACHINES T Walter vSiegentha'ler, Erlenba ch, Switzerland; as.signor to Maschinenfabrik Scharer, Erlenbach,

Zurich, Switzerland Application May 2a, 1943, Serial No; 488,881

; In Switzerland March 23,1942

, (01. 242 43) N inienticnrdates to thread traverse drums 3 3 Claims;

Particu arly intended to: winding machines and mprising twointercrasslng helical groov s. for

reciprocatingtbe. thread for producingv crosswin h ends-of the groovesmergi in each other. v

According tothe invention. both opp sitely directed guide groovesprovided are formed by three 7 main parts that are arranged on a commoncarrier membenynamely a. central: part and two and parts.

By these means manuiactureoi the means for guiding the. thread areconsiderably simplified compared with the production of a groovedcylinder in the hitherto conventional manner.

that is,.of; a cylinder into the material of the body of whichgroovesare worked. Furthermore, the manufacture according to thepres'entinvention .7

allows of varying the width of the guide grooves to any desiredextent-without any further pro visions by accordingly spacing thedrum'parts apart. Moreover, by virtue of the assembling of the drum ofindividual partsgas provided the measures to be adopted for preventedthe thread from taking a faulty course at the point of crossing of thegrooves are facilitated, and the further advantage is obtained that themanufacture of .the said individual parts is. feasible by resorting tocasting methods as well as to methods of pro- I ducing said parts fromsolid working material.

An embodiment oi the invention is illustrated, by wayof example only,in. the accompanying drawing, in which -Fig. 1 shows an elevation of athread traverse drum according to this invention;

Fig. 2 is an axial section of the same taken-on a horizontal plane ofFig. 1; i

Fig. 3 is a larger scale cross section which for simplifying theillustration is assumed to be taken along the contour of a groove: and

Fig. 4 is a sectional view of part of the drum taken in line 4-4 of Fig.1 to illustrate a detail. I The numeral l designates a driving shafteonwhich a cylindrical carrier member 2 is fixedly mounted for supportingthreeparts 3, 4 and 5 pushed thereonto. .These three parts 3, 4 and 5being respectively secured to the carrier member 2 by a screw 6, 1 or 8form together two helical intercrossing, oppositely directed guidegrooves 9, ID for the feeding thread, the grooves being shown only inschematical manner" The three parts 3, l and 5 are bounded at theiradjoining tangential direction.

sides by mating curved portions and are spaced apart a certain distancecorresponding tothe width of groove as required.

:At the :end points where rthegtooves Sand in merge in each other, thatat thepoints of. :re-

versaLa guide pin ll traversing i. e. bridgingthe roove s provided whichis fixed irra. bore .omhe' middle part 4. an projects intos somewhatlarger bore in the respective end part3. or :5. J Thespecificfunction'of these guide pins or stopswli will be hereinafterexplained. At the point ofqcrossing of the two grooves '9.and.;l0 thetwo end parts 3v and 5. are each providedwith a nose l2, 13respectively. The two noses;.l 3 criterion the thread.guidewayprovidedby the guide groove 9 in relativel O positedirectionsto such: an extent that each noseprotrudes acrossthe guideway formed 7by the crossing I groove. .thatis, :the guide groove Ill, whereby duringthe, rotation -.of L the traverse drumskippingof the threadat the pointof crossing from, .onegroove. intathe. other isrprevented, I whilst thecorrect passage of; the thread over lthel umm is,,however,nct impaired.p

In Fig. 3 a'winding carrier is shown at I I on v which a thread windingis in course of formation the diameter of which is yet small. Sincetheindividual guide pins H arranged .at the various points of .reversalaresituated near thecircum: ference of. the drum traversing the thread inopposite directions the thread is guided each time when its direction isreversed by the respective pin ll adjacent to the winding in course0110!! mation. This guiding effect is maintained unchanged throughoutthe entire winding operation,

thus while the thickness of the winding increases.

Forpurposes of comparison a winding l6 of a considerably greaterdiameter than that of the winding I5 is indicated by a chain-dotted linein Fig. 3 together with the thread arriving from the traverse drum andbeing also shown in a chain-dotted line, the guide pin ll being shown ina correspondingposition.

The arrangement of the guide pins H at the points of reversal of thethread has the result that the placing of the thread on the winding isefi'ected in correct manner so that no excess of threadmaterial isdeposited at the edge oi thewinding and consequently no what may betermed. salient threads (projecting thread j loops) are formed. Intheabsence of theseguide V pins II the thread'would continually passover H to the thread winding in course of formation Y away from thetraverse drum and thus also from the two points of reversal of thethread inthe The guide grooves Band I 0 have a constant depth throughouttheir extent. I

The parts 3 4 and 5 may, for example, be made 1 of artificial resin,sheet metal or similar materials The traverse drum according to thepresent in vention is suitable, apart from use in cross wind-, v

mg machines, alsofor combination with similar textile machines. Insteadof providing the points of reversal with guide pins, guide elements forthe thread maybe cast to one or the other part i,

of the drum. In the even't'that the drum is provided with two points ofguide groove crossings the main part constituting the middle part of thedrum may be assembled of several indi vidual pieces.

I claim:

o 1. In .a thread traversc drum, particularly'for winding machines, anassembly of three circumferentially grooved main drum parts, the groovedportions of the end parts being each provided with a nose said threeassembled main parts providing a middle part and two end parts of thetraverse drum, said end parts adjoining said middle part on either sideof the latter and forming by" their grooved 'portions together withthegrooved portion of said middle part two crossing helical grooves forreciprocating the thread for producing a crosswind therewith, while theends of said grooves merge in each other for forming two points ofreversal of direction of traverse of said, thread, said two nosesextending in relatively opposite directions into the thread guide- .wayformed by one of said grooves thereby adapting each of said noses toproject across the guideway formed by the crossing roove, for pre-"venting skipping of the thread at the point of crossing from one grooveinto the other,fand a carrier member supporting said assembly'of said ofthe latter and formingby their grooved por- 'tions together with thegrooved portion of said three drum parts.

2. In a thread traverse drum, particularly for winding machines, anassembly of three circum ierentially grooved main drum parts, said threeassembled main parts providing a middle part middle part twocrossinghelical grooves for reciprocating the thread for producing a crosswindtherewith while the ends of said grooves .merge in each other forforming two points of 15 reversal of direction of traverse of saidthread, stop means for guiding the thread arranged at said points ofreversal so as to bridge the thread ideway at the junctions of saidgroove ends, and a carrier member supporting said assembly of said threedrum parts. H 1 7 3; In a thread traverse drum,' particula rly forwinding machines, an assembly of-threec'ircurnferentially grooved main"drum parts, said three assembled main parts providing a middlep'art andtwo end parts of the traverse drum, said end parts adjoining said middlepart on either-side of the latter and forming by'their grooved portionstogether withthe groovedportion ofsaid middle part two crossing helicalgrooves for reciprocating the thread for pr0ducing"a'--crosswindtherewith, while, the' ends of said grooves merge in ea'chother forforming two points' of reversal of directionof traverse 'of saidthrad,guide pins for the thread'inserted in boresin the opposite walls of thethread 'guideway'at'sfaid points of reversal soas to bridgesaidguidewayat the junctions of said'groove ends, and aicarrier member{supporting said assembly of said three drumparts. v vUWALTEBQSIEEQEN'I'I-IALERQH

